How negative can a offset go before it effects performance?

Did you need a cab mount chop to fit 285s on the -25 wheel?

 

Go -10 and you can go 295/70-17 no cmc needed

 

Yes and a pinchweld fold if you intend on wheeling the truck at all. I rub the fender liner at the back of the well and the fender flare/liner up front. I fit a 285 on a +1 without a cab mount chop and just heat molded the fender liner a bit and barely rubbed off road. But regardless of what is noted above you will not properly clear a 295 on a -10 without a chop even with spc ucas I had less than 1/4" of clearence at ride height.

You can see the rub marks on the flap but not on the cab mount. That a 285/70r17 17x9 +1 had 2 uca set ups bolth with alignments from a very reputable shop.

 

I used an Icon UCA.. but yea zero rub offroad. I’m also on Fox Performance Elite coilovers with a 3/1.5 lift.

 

You might not be tracking this any longer, but I felt a positive handling benefit going from stock Sport wheels to -10.

A little visualization with the spare installed recently. That offset change could be felt when braking. Haha!

 

I have the exact same set up on my 24’ Trd pro 4R but with a 3/2 set up also zero rub offroad. 295/70-17 no cmc only needed to remove the mud flaps on both the taco and 4R.. Want to tell me again how it doesn’t work?!?

 

A) 4 runner not a tacoma. Known to be easier to fit larger tires
B) 3x2 will make it clear easier at ride height.

Go stuff a tire and turn see what sweet noises it makes. I gaurentee it will eat the cab mount. Street cleared vs actually cleared are 2 very different things

 

People don't have a firm grasp of why anecdotal evidence regarding tire fitment is basically useless with these trucks, nor that lift height matters exactly zero in terms of actual clearance. All of these trucks are slightly different from one another, so people who claim to fit oversized tires without modification are putting out bad info to the masses if it doesn't work in 100% of cases, especially when people have different definitions of clearance. Hell, I had slight rubbing on my UCA when I went to 255/85R16's, of which there is basically no mention of it occurring to anyone else in the hundreds of pages in the megathread about fitting those tires specifically on TRD offroad wheels and stock suspension. Unless people remove their coilovers, fully compress the suspension, and turn the wheels lock to lock, they have no business claiming anything other than stock wheels/tires "clears".

 

Variance between products and production runs is a huge overlooked aspect. There is never a clear black and white picture as your stating. The biggest issue is people look at clearence regularly as a 2 dimensional thing where as it's 3. Easy to slap on a tire turn it and go yep cool it's good. But then you get some flex in the lca bushings thst needs to be accounted for. Need to account for all of the steering angles while compressed. Or even the shift in hub position under compression, or lastly how a lift alters your track width so a -10 on 3" will not actually have the same overall width as a -10 at stock height. No one item seems big but when you start playing a game of mm every aspect counts.

 

Also seeing your truck with barely 1/4” of clearance with 285/70 and my truck with 295/70 is a huge difference in gap. I have over 3” of gap where the mud flap was. Perhaps it’s because new gen vs old gen? Idk.. Only thing I can think of.

 

I need to see a picture of yours at full lock and compressed and still have 3" of clearance from the cab mount. That's how I measured not a straight wheel with a lift at 3" doesn't count. If that's the case I clear 35's, untill suspensions cycled then I don't.

you can see the lack of clips and rub marks on the front of the liner. I don't have pictures of where it hits the rear of the fender liner. Or the self clearencing that's going on at the fender flare. Point is getting marks like this with the alignment I have state that a 295 or a -10 will not clear a cab mount without a chop. The only way it does is tall lift and don't flex with it turned. But I welcome you to prove me wrong and pull a shock and show it clearing the cab mount full lock and compressed.

I'd also like to know what you mean by new vs old gen from what I can see it's the same gen. 16-23 don't think there's any real changes that effect tire clearance. Outside of some mild variations in production tolerance.

 

100% even with alignment with wheels set forward. heres mine with 285s and -25 offset

 

also good to mention that some tires true size are significantly smaller than others. a 37" km3 is almost a full 2" smaller than mickey thomsons ive seen. bfgs seem to run small in general actually

 

ALLEGEDLY

 

also to ops original post from months ago. ive been running -53 offset and 35s on my tacomas for 10 years. never a single worn balljoint, tie rod, or wheel bearing. recently swapped the setup onto this 2023 and didn't notice a difference in handling besides the fact the ride was improved.

 

Bump steer is real at -38